They could go 7 WRs, I just don't think they will because it is hard to deploy that many.
They could go an extra LB.
They could go an extra DB (S or C
.
So much of this will depend, I think, on who they think are the best players. For instance if they think they only have 9 OL that are worth keeping; or they really like a couple of the DBs or LBs or whatever and don't think they can get them through waivers to the PS.
I also think it is inevitable that they'll pick up a player or two off of waivers because they are so high this year in when it's their turn to take a guy or pass on him. Bound to be somebody they like on another team that'll get cut.
Snead is always dinking around with the bottom of the roster anyway.